Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymerizing in tubular or loop reactor
Reexamination Certificate
2011-06-14
2011-06-14
Choi, Ling-Siu (Department: 1762)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymerizing in tubular or loop reactor
C526S348000, C526S160000, C526S124300, C526S142000, C526S140000
Reexamination Certificate
active
07960484
ABSTRACT:
Polymerization processes in a bulk loop reactor are described herein. In particular, a method of contacting a flow of metallocene with a flow of propylene is provided. This method includes directing the flow of metallocene towards a junction, directing the flow of propylene towards the junction and maintaining a portion of the flow of metallocene separate from a portion of the flow propylene within a portion of the junction downstream of the flow of propylene into the junction. In another embodiment, a method of introducing a quantity of antifouling agent into a catalyst mixing system is provided. In this embodiment a portion of the antifouling agent is introduced at or downstream of a point of contact of a stream of propylene with a stream of catalyst. The antifouling agent may be a member, alone or in combination with other members, selected from Stadis 450 Conductivity Improver, Synperonic antifouling agent, and Pluronic antifouling agent.
REFERENCES:
patent: 3324093 (1967-06-01), Alleman
patent: 5393851 (1995-02-01), Ewen et al.
patent: 6355741 (2002-03-01), Marechal
patent: 6437063 (2002-08-01), Karbasi et al.
patent: 6455643 (2002-09-01), Harlin et al.
patent: 6562914 (2003-05-01), Andtsjö et al.
patent: 11-166002 (1999-06-01), None
patent: 1998-045994 (1998-09-01), None
patent: WO 9820045 (1998-05-01), None
A machine translation from KIPRIS of KR 1998-0045994; dated Jan. 5, 2009; 9 pages.
Attoe David
Daumerie Michel
Gauthier William
Hortmann Kai
McGovern Kevin
Choi Ling-Siu
Fina Technology, Inc.
Kilpatrick-Lee Diane L.
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